542279873 has 2 divisors, whose sum is σ = 542279874. Its totient is φ = 542279872.

The previous prime is 542279861. The next prime is 542279921. The reversal of 542279873 is 378972245.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 541585984 + 693889 = 23272^2 + 833^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-542279873 is a prime.

It is a super-2 number, since 2×542279873² = 588134921321792258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (542279833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271139936 + 271139937.

It is an arithmetic number, because the mean of its divisors is an integer number (271139937).

Almost surely, 2^542279873 is an apocalyptic number.

It is an amenable number.

542279873 is a deficient number, since it is larger than the sum of its proper divisors (1).

542279873 is an equidigital number, since it uses as much as digits as its factorization.

542279873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 846720, while the sum is 47.

The square root of 542279873 is about 23286.9034652527. The cubic root of 542279873 is about 815.4696995176.

Subtracting from 542279873 its reverse (378972245), we obtain a triangular number (163307628 = T₁₈₀₇₂).

The spelling of 542279873 in words is "five hundred forty-two million, two hundred seventy-nine thousand, eight hundred seventy-three".